The characteristics of effectiveness and heat transfer for a row jets impinging on corrugated surface were experimentally investigated. Reynolds number, Re which was calculated based the exit velocity hydraulic diameter nozzle, 20000 jet-to-target spacing, L, varied from 2 to 10 times jet diameter, d. spacing between adjacent jets, Sx, kept constant at 4d. actual angle impingement distance diff...

Cooling from impinging water jets in runout table (ROT) processing depends on the fluid flow and depth of water accumulated in the water pool that forms on the surface of the moving steel strip. This effect is investigated with a three-dimensional (3-D) computational model of fluid flow, pressure, and free surface motion for realistic banks of nozzles within the flow rate region of the ROT proc...

ABSTRACT We study the evolution of one-dimensional relativistic jets, using exact solution Riemann problem for flows. For this purpose, we solve equations ideal special fluid composed dissimilar particles in flat space-time and thermodynamics is governed by a equation state. obtain jets impinging on denser ambient media. The time variation cross-section jet-head modelled incorporated. present i...

Abstract Local and integral characteristics of heat transfer are obtained at varying the Reynolds number Re = 5500, 11000, distance between jets y/D 1.8, from to surface z/D 0.5-10 for system two identical impinging jets. It is found in experiments that effect an adjacent jet leads enhancement local large distances nozzles barrier. also shown increase increases transfer, and, same time, weakens...

This contribution presents different approaches for the modeling of air entrainment under water by plunging jets in CFD codes. In simulations which include the full length of the jet and its environment, the process of bubble generation can not be resolved due to computational limitations. This is why the air entrainment has to be modeled in meso-scale simulations. In the frame of an EulerEuler...

In order to improve the erosion capacity of a supercritical carbon dioxide (SC-CO2) jet, the influence of a nano-silica additive on the rock erosion characteristics was experimentally investigated. By impinging the SC-CO2 jets with nano-silica mass fractions of 0 wt % (pure SC-CO2 jet), 3 wt %, 6 wt %, 9 wt %, 12 wt %, 15 wt %, and 18 wt % on specimens of red sandstone, the erosion volumes unde...

Impinging jet ventilation (IJV), which supplies a high momentum air impinging and spreading over the floor, could be used in both cooling heating modes. However, as low-level supply system, excessive temperature difference between head ankle levels may exist due to cool being directly supplied occupied zone. As one type of different personalized (PV) terminal device, ductless (DPV) is self-stan...